AR072479A1 - APPARATUS AND METHOD FOR THE CODING / DECODING OF AN AUDIO SIGNAL USING A GENERATION SWITCH SCHEME OF AJENA SENAL - Google Patents

APPARATUS AND METHOD FOR THE CODING / DECODING OF AN AUDIO SIGNAL USING A GENERATION SWITCH SCHEME OF AJENA SENAL

Info

Publication number
AR072479A1
AR072479A1 ARP090102545A ARP090102545A AR072479A1 AR 072479 A1 AR072479 A1 AR 072479A1 AR P090102545 A ARP090102545 A AR P090102545A AR P090102545 A ARP090102545 A AR P090102545A AR 072479 A1 AR072479 A1 AR 072479A1
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AR
Argentina
Prior art keywords
block
sub
audio signal
domain
processed
Prior art date
Application number
ARP090102545A
Other languages
Spanish (es)
Original Assignee
Fraunhofer Ges Forschung
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Application filed by Fraunhofer Ges Forschung filed Critical Fraunhofer Ges Forschung
Publication of AR072479A1 publication Critical patent/AR072479A1/en

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Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/04—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using predictive techniques
    • G10L19/16—Vocoder architecture
    • G10L19/18—Vocoders using multiple modes
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/04—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using predictive techniques
    • G10L19/16—Vocoder architecture
    • G10L19/18—Vocoders using multiple modes
    • G10L19/20—Vocoders using multiple modes using sound class specific coding, hybrid encoders or object based coding
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/02—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using spectral analysis, e.g. transform vocoders or subband vocoders
    • G10L19/022—Blocking, i.e. grouping of samples in time; Choice of analysis windows; Overlap factoring
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
    • H03M7/30—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/02—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using spectral analysis, e.g. transform vocoders or subband vocoders
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/04—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using predictive techniques

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computational Linguistics (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Theoretical Computer Science (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Abstract

Un aparato para la codificacion de una senal de audio, que comprende una funcion de ventana (11), para someter a ventana un primer bloque de la senal de audio usando una ventana de análisis, donde la ventana de análisis tiene una porcion de aliasing y una porcion adicional. El aparato además comprende un procesador (12), para el procesamiento del primer subloque de la senal de audio asociado con la porcion de aliasing, mediante la transformacion del subloque de un dominio en un dominio diferente, después de la ventana del primer subloque para obtener un primer subloque procesado; y para el procesamiento de un segundo subloque de la senal de audio asociado con la otra porcion, mediante la transformacion del segundo subloque, del dominio en el dominio diferente, antes de someter a ventana el segundo subloque a fin de obtener un segundo subloque procesado. El aparato comprende, asimismo, un transformador (13), para la conversion del primer subloque procesado y el segundo subloque procesado, del dominio diferente en un dominio diferente adicional, usando el mismo principio de transformacion de bloques, de manera de obtener un primer bloque convertido, que entonces puede ser comprimido usando cualquiera de los algoritmos de compresion de informacion bien conocidos. En consecuencia, puede obtenerse una conmutacion críticamente muestreada entre dos modos de codificacion, ya que las porciones de aliasing que se producen en dos dominios diferentes se hacen coincidir entre sí.An apparatus for encoding an audio signal, comprising a window function (11), for windowing a first block of the audio signal using an analysis window, where the analysis window has an aliasing portion and An additional portion. The apparatus further comprises a processor (12), for processing the first sub-block of the audio signal associated with the portion of aliasing, by transforming the sub-block of a domain into a different domain, after the window of the first sub-block to obtain a first sub-block processed; and for the processing of a second sub-block of the audio signal associated with the other portion, by transforming the second sub-block, of the domain into the different domain, before submitting the second sub-block to the window in order to obtain a second sub-block processed. The apparatus also comprises a transformer (13), for the conversion of the first processed sub-block and the second processed sub-block, of the different domain into an additional different domain, using the same principle of block transformation, so as to obtain a first block converted, which can then be compressed using any of the well known information compression algorithms. Consequently, a critically sampled switching between two coding modes can be obtained, since the aliasing portions that occur in two different domains are matched together.

ARP090102545A 2008-07-11 2009-07-07 APPARATUS AND METHOD FOR THE CODING / DECODING OF AN AUDIO SIGNAL USING A GENERATION SWITCH SCHEME OF AJENA SENAL AR072479A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US7985208P 2008-07-11 2008-07-11
PCT/EP2009/004374 WO2010003532A1 (en) 2008-07-11 2009-06-17 Apparatus and method for encoding/decoding an audio signal using an aliasing switch scheme

Publications (1)

Publication Number Publication Date
AR072479A1 true AR072479A1 (en) 2010-09-01

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Country Status (19)

Country Link
US (1) US8862480B2 (en)
EP (1) EP2301020B1 (en)
JP (1) JP5551693B2 (en)
KR (1) KR101250309B1 (en)
CN (1) CN102089812B (en)
AR (1) AR072479A1 (en)
AU (1) AU2009267518B2 (en)
BR (1) BRPI0910783B1 (en)
CA (1) CA2730355C (en)
CO (1) CO6341672A2 (en)
ES (1) ES2401487T3 (en)
HK (1) HK1155842A1 (en)
MX (1) MX2011000373A (en)
MY (1) MY152252A (en)
PL (1) PL2301020T3 (en)
RU (1) RU2492530C2 (en)
TW (1) TWI426503B (en)
WO (1) WO2010003532A1 (en)
ZA (1) ZA201009259B (en)

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MY152252A (en) 2014-09-15
CN102089812B (en) 2013-03-20
TWI426503B (en) 2014-02-11
KR20110040823A (en) 2011-04-20
AU2009267518B2 (en) 2012-08-16
WO2010003532A1 (en) 2010-01-14
JP2011527446A (en) 2011-10-27
BRPI0910783A2 (en) 2020-11-03
CA2730355A1 (en) 2010-01-14
ZA201009259B (en) 2011-09-28
ES2401487T3 (en) 2013-04-22
CO6341672A2 (en) 2011-11-21
EP2301020A1 (en) 2011-03-30
HK1155842A1 (en) 2012-05-25
KR101250309B1 (en) 2013-04-04
US8862480B2 (en) 2014-10-14
PL2301020T3 (en) 2013-06-28
JP5551693B2 (en) 2014-07-16
US20110173009A1 (en) 2011-07-14
AU2009267518A1 (en) 2010-01-14
CN102089812A (en) 2011-06-08
MX2011000373A (en) 2011-03-15
CA2730355C (en) 2016-03-22
RU2492530C2 (en) 2013-09-10
RU2011102426A (en) 2012-07-27
TW201011737A (en) 2010-03-16
BRPI0910783B1 (en) 2024-02-27
EP2301020B1 (en) 2013-01-02

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